Air-valve casing.



H. F. GOETZ.

AIR VALVE CASING.

APPLICATION men JULY l5.'l9l8.

Patented Nov. 26, 1918.

A UNITED STATES PATENT oTTion.

HENRY F. GOETZ,

0F WATERBUBY, CONNECTICUT, ASSIGNOR TO WATERBURY MFG. CO.,

OF 'WATERBURY, CONNECTICUT, A CORPORATION.

AIR-VALVE CASING.

Specification of Letters Patent.

Patented Nov. 26, 1918.

To all whom it may concern:

Be it known that I, HENRY F. Gon'rz, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented a new and useful Improvement in Air-Valve Casings; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in-

Figure 1 a View in side elevation of an air-valve casing constructed. in'accordance with my invention.

Fig. 2 a view thereof in longitudinal central section.

Fig. 3 a detached View partly in side elevation, and partly in section, of the casingbody.

Fig. 4 a detached view, partly in side elevation and partly in section, of the casingneck.

My invention relates to an improved airvalve casing, the object being to produce at a reduced cost for manufacture, an article of superior uniformity and accuracy.

With these ends in View, my invention consists in an air-valve casing having certain details of construction as will be hereinafter described and pointed out in the claim.

In carrying out my invention, I produce a sheet-metal casing-body 2 having its rounded end 3 formed with a concentric opening 4: the edge of which is turned inward or spiled to form a retaining-flange 5. The casing-neck 6 is turned from a short section of solid rod and has its enlarged outer end formed with external threads 7 for the application to it of a standard vented cap which is not shown. The inner portion of the neck is internally threaded as at 8 for the reception of the usual adjustable screw which is not shown. At its inner end the Copies of this patent may be obtained for neck is formed with an annular cit-setting abutment-shoulder 9 and with a concentric bushing or neck 10, the latter being adapted in external diameter to fit within the opening 4, and being made long enough to be turned outward, and rolled over the retaining-flange 5 which is at the same time turned outward and rolled over upon itself to form a bead, as it were, which is clasped by the rolled over portion of the neck 10. In this process the shoulder 9 is firmly seated upon the casing-body as shown in Fig. 2. In this manner the casing-neck is united to the casing-body so as to form a steam-tight and air-tight joint. By producing the body and neck separately they may be formed with great accuracy and so as to be interchangeable, the resulting article being stronger and much closer to gage than when produced in one piece by repeated drawings so as to form the neck of the casing integral with the body thereof.

I claim An air-valve casing comprising a sheet-- metal casing-body having its rounded end formed with a concentric opening the edge of which is turned inward or spiled to form a retaining-flange, and a separately formed casing-neck having its outer end externally threaded and its inner end internally threaded and having its inner end formed with an abutment-flange to rest upon the said casing-body around the concentric opening therein and with a retaining-flange adapted in diameter and length to fit within the said opening and to be turned outward over the retaining-flange of the body so as to firmly unite the two parts.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

HENRY F. GOETZ.

Witnesses J. GRANDELL, R. H. SHELDRICK.

five cents each, by addressing the "Commissioner of Patents,

Washington, D. G. 

